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Effects of urban surface geometry on remotely-sensed surface temperature
Abstract
Direct observations of urban surface temperature in daytime are made using a thermal scanner mounted in a helicopter over three land-use areas in Vancouver, B.C. The results reveal strong directional variations in the observed apparent surface temperature. The variations arise due to the differential patterns of irradiated and shaded surfaces within the sensor field of view created by the three-dimensional urban surface structure and the position of the Sun. The directional variations may be considered to be a form of effective anisotropy due to the large scale roughness of the urban surface. Variations in excess of 9 C were measured over a downtown area. Urban residential and light industrial land-use areas also exhibited strong effective anisotropy. The directional temperature variations are of similar magnitude to atmospheric corrections applied to thermal imagery. This implies that effective anisotropy should receive serious consideration in the interpretation of thermal imagery obtained over urban areas. The scale dependence of the effective anisotropy is discussed.
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Citations
Cited by
Arnfield, A. J. (2003) · International Journal of Climatology · doi:10.1002/joc.859 · Cited by 3,543
Thermal remote sensing of urban climates
Voogt, J. A., & Oke, T. R. (2003) · Remote Sensing of Environment · doi:10.1016/s0034-4257(03)00079-8 · Cited by 3,206
Self-citationWeng, Q. (2009) · ISPRS Journal of Photogrammetry and Remote Sensing · doi:10.1016/j.isprsjprs.2009.03.007 · Cited by 1,446
Zhou, W., Huang, G., & Cadenasso, M. L. (2011) · Landscape and Urban Planning · doi:10.1016/j.landurbplan.2011.03.009 · Cited by 1,042
MODIS detected surface urban heat islands and sinks: Global locations and controls
Clinton, N., & Gong, P. (2013) · Remote Sensing of Environment · doi:10.1016/j.rse.2013.03.008 · Cited by 521
Metadata
- Authors
- Voogt, J. A., & Oke, T. R.
- Venue
- International Journal of Remote Sensing
- Publisher
- Informa UK Limited
- Published
- 1998-01
- Volume
- 19
- Issue
- 5
- Pages
- 895-920
- ISSN
- 0143-1161 (ISSN-L)
- 1366-5901
- OpenAlex
- W2100275724
- Cited by
- 302
- References
- 0
- FWCI
- 4.94
- Type
- journal article
- Language
- en
- Open access
- closed
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- Voogt, J. A., & Oke, T. R. (1998). Effects of urban surface geometry on remotely-sensed surface temperature. International Journal of Remote Sensing. https://doi.org/10.1080/014311698215784
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